Valve-operating mechanism for internal-combustion engines.



s. LGFFLER.

VALVE OPERATING MECHANISM FOR. INTERNAL COMBUSTION ENGINES.

Patented Jul y 20,1909.

APPLIOATION JFILED MAY 26, 1.906.

1 m 5mm; SNVENTQR a SAMUEL LijFFLER, OF WITKOWITZ, AUSTRIA-HUNGARY.

VALVE-OPERATING MECHANISM FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented July 20, 1908.

Application -filed May 26, 1906. Serial No. 318,795.

To all whom it may concern:

Be it known that I, SAMUEL LoFFLER, of

Witkowitz, Austria-Hungary, have invented a certain new and useful Improvement in I Valve-Operating Mechanism for Internalarranged to be actuated by rotary cams.

My invention provides mechanism which may be utilized to adustably vary the points in the cycle ol operation of an engine at which the valves are opened or closed, and the period during which they remain open.

As hereinafter described my invention. coifnnioes one or more members of different on in ditlcrent regions of their w. ich may. be adjustably interposed between valve actuating ams and valve rods, or be withdiavn, so as to control the operation of the rams with respect to the valves, without changing either the cams or the valves.

My invention comprises the various novel features of construction and, arrangement hereinafter more definitely specified.

Figure I, is a diagrammatic view, of a valve operating mecl'ianisn'i adapted for startingan internal combustion engine in which the outlet valve is rendered inoperative alter the engine has been set in motion. Fig. ll, a diagrammatic view of a valve operating mechanism adapted for starting lour cycle engine 01' the type which, during the starting ])012111011-18 operated as a two cycle engine, compressed air being admitted through the inlet valve. 'l ig. lll, is diagrammatie view of valve operating rnechanism adapted .l'or changing over a lour cycle engine. 7 l ig. lV, is a diagrammatic view of valve o 'ierating mechanism adapted lor changing a four cycle engine to operate as a two cycle engine.

Rolex-ring to Fig. I; 1, is the cam shalt can ryin g the cam 2, and 3 is the valve actuating rod provided with the roller 4. The wedge bar is conveniently su )ported by the lever (1 having the pivot 7, an said bar 5 is upheld against the roller 4, by the spring 10. In the position of said bar 5 shown in dotted lines in Fig. l, the camQ may rotate freely beneath it without moving the valve rod 3. However, when said bar 5 is shifted to the positli, and hereinafter termed wedge bars,

portion 11, is interposed between said cam 2 and roller 4, so that the latter is uplifted and the valve operated by the rotation of said cam 2. y

The valve operating mechanism shown in Fig. I, may be advantageously employed in an internal combustion engine re Luring that the outlet valve shall be positive y actuated during the starting operation, and released after the engine has been set in motion. In such an einbodiment the rod 3 would be connected to the outlet valve, and the bar 5 be presented in the position shown in full lines during the starting operation, and in the position shown in dotted lines during the continued operation oi the engine. Moreover, it may be observed that if said rod 3 is connect ed with the igniter, the latter may be renderedoperative or inoperative at will, in accordance with the posltion of said bar 5.

Referring to Fig. II; the cam shaft 13, carries the cams 14, and 16, and the valve rod 18, is provided with the roller 19,which bears upon both of the wedge bars and 21, althoughsaid bars extend in different planes.

, Said bars are respectively carriedby the levers 22, and 24, and provided 'wlth the springs 25, and 26, to uphold said bars in contact with said roller 19. The cam 14, rotates in the plane of the bar 20, so as to raise the valve rod 18, when the high portion27, of said bar '20, is-presented between said cam and the roller 19; the positionshown being such that said cam 14, may be rotated beneath said bar 20, without operating said rod 18. The cams 15, and 16, rotate in the plane of the bar 21, so that when the high portion 28, of the latter is presented beneath the roller 19, as shown, the valve rod 18, is raised by said cams 15, and 16, in succession, as the shaft 13 rotates. It may be noted that the wedge bars 20, and 21', may be shifted independently of each other, so that either or both can be engaged by the cams, or both be rendered inoperative.

The arrangement last described may be advantageously employed in a four cycle ongine, which during the starting operation must be operated as a two cycle engine; compressed air being admitted through the inlet valve. In such an engine it is desirable to open the inlet valve during a short time at the beginning of the inlet stroke and during a short time at the beginning ol the worklng stroke, 111 which case the inlet valve wouldbe l'ion shown in full lilrcainrsaid figure, its high c cooled with the rod 18, and, the bars 20 hovro in H; the inlet and being not es 0 inslnnts, indicated in Figs. 1. l

and 1S, during the desired periods during the two eyele stoning operation of the engine. However, v m it dented to effect 2, four cycle operation of the gine; thewodge her 21 is wi'tlitlrzivni so no to render tire came 15, and i6, inoperetive, and the wedge bar 20, internosed so as to render the can: operte tive tuning the rt gilor runningof the engine. The mechanism lest described nwy else be en'iployed to operate the exhaust valve of on engine of type lest described, in the some manner the inlet valve.

h l'erring' to Fig. .l the corn shaft 30, is pro'i tiled With the and 32, lneh rotuxte in different planes, end the valve rod 34-, is pro video with roller 35. The Wedge loan 58, l:- LS high portions 39, and all), vtencling in diiferent phi. respeotr/ely in re said some 33, and 32. Said bar 38,,is carried by the lever 4-1 and provided with the spring 413, which normally upholds it against the roller 35. lllien said her 38, is in the position shown 11 in full lines in Ill; the com 31, is operative and the earn 32, inoperative, but when id bin" 38, is shifted to the position shown in dotted lines in said figure, the

com. 31, is rendered inoperative and the com 32 operative.

The meelnn' ism lest described may be till" ventegeously employed for char cycle engines to operate as two oyoe engines. It is to be understood that rollers, may be substituted for the rigidly projecting high portions of the Wedge bars above described;- for instance, as shown in Fig. IV, wherein the 43, is provided with the rollers 44:, and 45;.wl1icl1 extend in different planes, like the projections 39, end 40, shown in Fig. ill.

Although the valve rods may be eonvere iently tli oosecl in. redial relation-With the 7 l, and Jney be otherwise located." For inis indicated in Pig. 1V; the valve rod i in eccentric relation to the cum. t .et a greater extentol' motion to seitl rod than it the minis ll), radially thereon.

it is to be understood thot the lovers 22 and 24;, shown in ,l'ig. ll, and the correspond ing parts in the other 1" s, may be oonveniently operated by wind in the manner a ovo deseriljied.

it may be observed that one mlvzn'ltzige of the mechanism above described, is that the desired change in the operation of the engine may be accomplished in any (.l( ll'Ctl position of the crank snail, lmennse sznd meelulnisin is at all times free in be operm oil;

I do not desire to lin to the pie ih lo iatxlum i ii it; H

stry with ng tour eeeeeo departing from the essential features of my invention.

I claim 2" l n valve operating mechanism for internal combustion engines, the combination with it rotor-v mm; of means whereby the efteot of said crnn u pon the valve may be veriobly determined mmprising o. Wedge lmr 21.1- rangeil to be adjusted relatively to said coin; means plVUtzLlly supporting sold bar; and, means eonnterbalinieing said her on its pivotal support, substantially as set forth.

2.- In valve operating mechanism for internal combustion engines, the eoinl'iinntion with a rotary ernn; of means whereby the efteet 0t seid coin upon the valve may be veriobly illetfii'lllillijd, comprising [t \l'(tlf"i3 lmr 2L1- ronged to adjusted relatively to so'd min; means supporting said bar for horizontal. reciprociilion with respect to said mm, mom prising a. vertically disposed lover; 2L piv tal connection between the upper end of sold lever and sold bur; v. siolionzir, 'luleruin (Ll; thelm verend ol'sliid lever; and, n. oounterbul once tzonneeted with said bar :it the end thereof opposite to said mm, substontlull as set forth. ,1 V

3. 1n valve operating Jlxeolumlmn for internal ool'nbuslion engines, the comblurnion 'witli two rotary Winsol tliflemnt extent; of moons 'wllorolrv the client of sold (:ollns up n the vol; s man," be Vatl'lz: bly determined ooniprising two Wedge bars zu'rmlgvil to be rule- 'ienilently :nljusted reli-ilivoly to he respontive eznns; moons simporlin sold lullm l'or horizontel 1' *iprocolion will: respect to mid eams, comp1ising twoi1i le1. -1zi'l rnt veri ic'ully disposed levers; a pivot ol vonnecl ion bel noon the upper ends of sold lev s and rr-soeriiw bars; and 2t slotionm'y l'ulermu :Lt llio lo'WQl' ends of sititl le s, whereby Sitlll leve s may be presented {uni witlulrzm'n in alter] .fiion with respect to said (nuns, slznnioll m;

a set forth.

:l n valve operating inm-lmnism lor internal eiu'nhnstion engines, the coinliiimliiu: 'j r'z'nns, having :2. m'nnmon axis. in (lill LlOlll planes; l' moons whereby the client of said Poms upon l'lu valves only be v2. b il(l .l'llllll(\l; :oniprlsing a Wedge bzu' prih iiloil v. ill; rojeclion.-; respectively zn'r'f ,jll to register with the re--- speolive (aims in :L-llernution; :uul means-supporting sold bar for lmrizonlul reciprocation transversely with respect to the axis of SlLlll minis, substantially as set forth.

ln testimony VsllGl'OOi, l have hereunto signed my mime, :tt Cologne, (lernmny, this llllll (lay of my 2906.

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